Improved ship s windlass



UNITED. STATES PATENT OFFICE.

PETER H. JACKSON, OF NEW YORK, N. Y.

IMPROVED SHIPS WINDLASS.

Specification forming part of Letters Patent No. 57,146, dated August 14, 1866.

To all whom it may concern:

Be it known that I, PETER H. JACKSON, of the city and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Ships7 Windlasses; and I do hereby declare the following to be a full, clear, and exact description of the said invention, reference being had to the annexed drawings, making part of this specification, whereint Figure l is a vertical section of my improved windlass. Fig. 2 is a sectional plan of the same below the line fr and Fig. 3 is a sectional plan of the chain-wheel at the line il il- Similar marks of reference denote thesame parts.

My invention has for its object the rotating of a chain'wheel by means of a capstan, and with greater or less power,\in consequence of the changeable relative speed of the capstan and chain-wheel, and I allow the chain to run out with greater or less speed by a friction apparatus.

In the drawings, a represents the upper or forecastle deck or raised platform; b, a portion of the main deck. c is the main vertical shaft, stepped upon the main deck a and guided by the central portion or arms d d of the pawl-bed e.

f is the capstanbarrel, and g the pawls taki ing the bed e, and which pawls may be thrown over either way, so that the oapstan may be turned in one direction or the other.

7L is a sleeve around the shaft c, andI k is a bearing formed within the barrel f that surrounds said sleeve L. l is a hand-spike head attached to the upper end of the capstan-barrel j', and m is a cap to the apparatus, rmly attached to the upper end of the shaft c.

In the capstan-barrel f mortises are provided, into which keys z' are inserted, that may be pushed into mortises or slots in the head 'n of the sleeve h to connect said sleeve and the barrel f, or withdrawn to allow of their separate rotation; and o o are keys set in re cesses in the hand-spike socket-head l, that may be slid into notches in lugs on the under side of the cap m to connect the said capstan and cap, or be drawn out to allow the separate rotation of the capstan from the shaft.

In the pawl-bed, between the arms d d, is a gear-wheel, p, keyed upon the shaft c, and at the lower end of the sleeve h is a gear-wheel, q. The intermediate wheels, i' and s, are sustained upon the arms d cl, and two or more pairs may be used, and the wheels r gear into the wheel q and the wheels s into the gear p.

The relative sizes ot' the gears p and q, and the consequent dii'erence in the sizes of the gears r and s, determine the relative speeds and consequent power, as next described.

t is achain-wheel, forming a windlass for the cable. This is connected to the shaft c near the surface of the deck b. If the keys t' t' are withdrawn and the keys o o pushed in so as to connect lthe cap on and the capstan, the shaft c will be rotated at the same speed as the capstan, and with no different purchase on the chain-wheel than there would be if the said chain.- wheel and capstan were perinanently connected to the shaft; but if the keys o o are drawn out and the keys i t' pushed in so as to connect the sleeve h and capstan-barrel the shaft c will be rotated slower than the capstan, in consequence of the gearing p, g, r, and s; hence the chain-wheel t can be employed with a heavier anchor or under a greater strain Thus I am enabled to obtain from the sam'e capstan two different speeds of the chainwheel.

The chain-wheel is made with an annular recess to receive the chain, and with lugs corresponding to the shape lof the links; and around the said chain-wheel, in its deepest groove, passes a friction-band, c, the ends of which are attached to a block, o, that is movable in slides w and I provide a second block, 2, placed so as to take against the lower edge of the chainwheel t. Between these blocks c and 2 is a cam, 3, upon a vertical spindle, 9, that is free to turn, and also to move toward or away from the chain wheel, but is supported sidewise within a bearing, 4. At the upper end of this spindle 9 is a lever, 5, that is moved whenever it is desired to tighten the friction-strap u and check the rotation of the chain-wheel for stopping the cable as it may be running out. At the same time the cam 3 presses the block 2 against the edge of the chain-wheel t. By this arrangement the friction to the chain-wheel does not bind said wheel to the vertical shaft c, but leaves that free to turn while the chain is stopped by the friction. This friction strap also prevents any of the links running around, in consequence of becoming jammed, and injuring the apparatus. This arrangement of friction-strap and block may be applied to a Windlass upon a horizontal shaft as Well as t0 one on a vert-ical shaft.

The capstan-head may be made with a double range of hand-spike sockets, as seen by red lines in Fig. 1, if so' desired, in Which case the keys or bolts o o may be dispensed with, the hand-spikes being changeable to the upper head to rotate the shaft c by a direct application of power.

It will be understood that the barrel f may be disconnected by drawing out the keys it' and o o so as to be used While other parts of the apparatus are standing still, and also that the disk 6, which is keyed on the shaft c and provided With movable keys 7 7, is employed for connecting the chain-wheel and shaft c, or for disconnecting them, so that the chainwheel may rotate independent of the sha-ft in allowing the chain to run out 5 or any other means may. be employed for connecting the chain-wheel t and shaft c.

What I claim, and desire to secure by Letters Patent, is-

l. The sleeve h, connected by the gearing p, q, r, and s With the shaft c, in combination with the capstan-barrel f and keys t' i, -for connecting the said capstan-barrel and sleeve, to give to the said shaft o and Windlass a slower. movement than that of the capstan, or allow of the separate movement of the capstan, as set forth.

2. The head Z on the upper end of the shaft c, in combination with the keys o 0 and capstan -barrel f and gearing p, q, r, and s, as and for the purposes set forth.

3. The friction-band u, applied to the inner recess of the chain-Wheel t, as and for the purposes set forth.

4. The combination of the friction -strap fu.,

kblocks o and 2, and cam 3, applied substantially as and for the purposes set forth.

In Witness whereof I have hereunto set my signature this 22d day of June, A. D. 1866. PETER H. JACKSON.

Witnesses:

Guns. H. SMITH, GEO. D. NVALKER. 

